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avcodec/hnm4video: Don't return nonsense error messages 

The HNM 4 video decoder's init function claimed that an allocation
failed if the image dimensions are wrong. This is fixed in this commit:
The dimensions are checked before the allocations are attempted.
The check whether width * height is zero is redundant as
av_image_check_size() already checks for this; it has been removed.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2020-09-14 17:53:58 +02:00
parent 042af30303
commit cc83f36b9d
1 changed files with 3 additions and 3 deletions
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6
libavcodec/hnm4video.c
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@ -473,6 +473,8 @@ static av_cold int hnm_decode_init(AVCodecContext *avctx)
ret = av_image_check_size(avctx->width, avctx->height, 0, avctx);
if (ret < 0)
return ret;
if (avctx->height & 1)
return AVERROR(EINVAL);
hnm->version = avctx->extradata[0];
avctx->pix_fmt = AV_PIX_FMT_PAL8;
@ -482,9 +484,7 @@ static av_cold int hnm_decode_init(AVCodecContext *avctx)
hnm->buffer2 = av_mallocz(avctx->width * avctx->height);
hnm->processed = av_mallocz(avctx->width * avctx->height);
if ( !hnm->buffer1 || !hnm->buffer2 || !hnm->processed
|| avctx->width * avctx->height == 0
|| avctx->height % 2) {
if (!hnm->buffer1 || !hnm->buffer2 || !hnm->processed) {
av_log(avctx, AV_LOG_ERROR, "av_mallocz() failed\n");
return AVERROR(ENOMEM);
}